• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2002년도 추계공동학술대회논문집
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• pp.161-167
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• 2002

Cai-go management facility of harbor are required an expansion due to increase of cargo quantity. Design technology of Yard AGV call be possible to deal many cargo rapidly and accurately. So it is produced a profit about cal-go management. This study is presented optimum of suspension parameter for design technology Yard AGV. Model I, II are modeled about Initial of container weight, height. When the maximum stroke of suspension is 0.26m, optimum is achieved to reduce the reaction force at the minimum. Also, the reaction force is study to become stability in I second. A change of spring constant and coefficient of damper make change the reaction force and minimum reaction force appear in optimum value. All modeling and analysis are used combination. contact element of Ansys program.

• 경영과학
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• 제26권3호
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• pp.11-21
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• 2009

In this paper, we proposed some valuable analysis results of cultivation campaign marketing in A mobile telephone company. The cultivation campaign marketing is a new outbound TM campaign strategy composed of 4 steps for new subscribers. During the analyses, attrition rate of A mobile company, outbound TM rejection rate, contact rate/call success rate and additional service attrition rate after subscription are measured as an effect of cultivation campaign. The results showed that there were no statistical significance in improving retention rate between customers experienced 4 step cultivation campaign and control group. However, the cultivation campaign had a better effect on improving response rate and success of selling additional service product of mobile company compared to general selling campaign. This is because cultivation campaign group had been taking care of from subscription time. It is suggested that cultivation campaign had better confined customers more likely to buy additional service to outbound TM for the sake of financial efficiency.

• Journal of information and communication convergence engineering
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• 제8권1호
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• pp.1-5
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• 2010

In this paper, we propose for improving QoS in wireless micro cellular network using Cellular-IP/PRC(Paging Route Cache) with Paging Cache and Route Cache in Cellular-IP and propose for performance of realtime and non-real time handoff service using Handoff state machine Paging Route Cache. Although the Cellular-IP/PRC technology is devised for mobile internet communication, it bas its vulnerability in frequent handoff environment. On the other hand, Cellular IP combines the capability of cellular networks to provide high performance handoff and efficient location management of active and idle mobile users with the inherent flexibility, robustness and scalability found in IP networks. Also Cellular-IP/PRC use semi-soft handoff. During semi-soft hand off a mobile host may be in contact with either of the old and new base stations and receive packets from them. Packets intended to the mobile node are sent to both base stations and buffered, so when the mobile host eventually moves to the new location it can continue to receive packets without interruption. It should be suitable for realtime service such as multimedia traffic. But, much waste of resource will occur in this method, especially for non-real time services such as FTP and E-mail. Therefore, a new algorithm that performs different handoff according to characteristic of each traffic by use of reserved field in IP packet is proposed in this thesis. This hand off state machine using differentiated handoff improves quality of services in Cellular-IP/PRC. Suggested algorithm shows better performance than existing technology in wireless mobile internet communication environment. Matlab simulation results are improving QoS, show call drop and call blocking provided to Paging Router Cache during handoff state machine in Cellular-IP/PRC.

• 한국조사연구학회지:조사연구
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• 제11권2호
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• pp.141-160
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• 2010

본 연구는 전화조사 상황에서 무선표집절차를 적용하여 조사를 실시한 후 그 결과를 분석한 것이다. 2009년 10월 26일부터 11월 18일까지 무선표집방법을 이용하여 전화조사를 실시한 결과, 전화번호 수 2,454개 가운데 조사성공 637건, 조사실패 1,817건으로 나타났다. 조사결과를 조사성공률, 성공 및 실패사례의 응답자의 인구학적 특성, 응답단계별 이슈에 대한 응답특성 등을 중심으로 분석했다. 분석결과 부재중을 제외한 조사 성공비율은 45.7%로 나타났다. 조사실패의 가장 큰 원인은 부재중이었으며, 조사단계가 올라가도 젊은 층의 응답률 저조는 개선되지 않았다. 응답단계에 따라 응답자의 이슈에 대한 인지도나 능동성이 달라지지는 않았으나 전반적으로 단계를 높일수록 다양한 시각의 응답이 포함되는 경향이 나타났다. 무선표집은 비접촉자의 문제를 완화할 수 있고 조사정확도를 높이기 위한 해결책을 찾아 나갈 수 있다는 점에서 후속연구가 이어질 필요가 있다.

• International Journal of Computer Science & Network Security
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• 제21권8호
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• pp.267-275
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• 2021

Smart application is developed in this paper by using an android-based platform to automatically determine the human emergency state (Lifesaver) by using different technology sensors of the mobile. In practice, this Lifesaver has many applications, and it can be easily combined with other applications as well to determine the emergency of humans. For example, if an old human falls due to some medical reasons, then this application is automatically determining the human state and then calls a person from this emergency contact list. Moreover, if the car accidentally crashes due to an accident, then the Lifesaver application is also helping to call a person who is on the emergency contact list to save human life. Therefore, the main objective of this project is to develop an application that can save human life. As a result, the proposed Lifesaver application is utilized to assist the person to get immediate attention in case of absence of help in four different situations. To develop the Lifesaver system, the GPS is also integrated to get the exact location of a human in case of emergency. Moreover, the emergency list of friends and authorities is also maintained to develop this application. To test and evaluate the Lifesaver system, the 50 different human data are collected with different age groups in the range of (40-70) and the performance of the Lifesaver application is also evaluated and compared with other state-of-the-art applications. On average, the Lifesaver system is achieved 95.5% detection accuracy and the value of 91.5 based on emergency index metric, which is outperformed compared to other applications in this domain.

• 한국통신학회논문지
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• 제36권1B호
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• pp.37-42
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• 2011

최근 이동통신 단말기들의 분실 또는 도난을 통해 개인 정보의 유출로 타인의 도용에 우려가 되는 바, 본 논문에서는 이동통신 단말기의 분실 시에 잠금 기능 설정을 설정하지 않은 경우에도 단말기 안의 정보를 원격으로 제어 할 수 있는 방법을 구현하고자 한다. 제안하는 시스템의 주요 가능은 크게 4가지 부분으로 구성되는 데 사용자가 단말기를 원격 제어할 수 있도록 인터페이스 역할을 하는 웹사이트 제공부, 사용자가 본인임을 확인하며 가입된 이동통신사 시스템으로부터 가입자확인 정보를 수행하는 사용자 확인부, 단말기의 실 소유자임이 확인되면 원격제어 프로그램을 가동시키기 위한 접속코드를 단말기로 전송하여 접속을 설정하는 접속 관리부, 단말기를 원격 제어하기 위한 원격 제어 서비스 코드 및 환경 설정 값을 단말기로 전송하고 단말기로부터 서비스 완료 코드를 수신하는 서비스 실행부를 포함한다.

• 품질경영학회지
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• 제44권3호
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• pp.649-660
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• 2016

Purpose: The purpose of this study is to find empirical studies the causal relationship among positive defining representation, negative defining representation, surface acting, deep acting, dissatisfaction of job, and intention of job transfer. Methods: The collected data through the survey by customer satisfaction team of "A" company call center. Results: The result of this study is that emotion and behavior norm influence on deep act of expressing both positive impacts of the employees. Conclusion: Feelings of corporate representation norm is psychologically of employees that because it affects even also must facilitate the surface acts and internal acts of employees and job dissatisfaction at the same time due to emotional dissonance and emotional exhaustion and turnover are hidden on the back emotion norms in the contact department, it should be aware of the need to address the emotional problems. Companies need to develop a variety of programs with attention to addressing the emotional difficulties experienced by workers.

• Child Health Nursing Research
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• 제8권4호
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• pp.458-468
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• 2002

The purpose of this study was to identify metacommunicative behaviors between nurses and patients in a pediatric unit. The research method included observation using videotaping. Data were collected from December, 2001 to February, 2002. Total six nurses, and eight patients and their mothers in a pediatric unit participated in this study. The interactions were videotaped under the participants' consent. The participants were observed for total 8 hours over 2-day period. Special episodes which were identified as metacommunicative behaviors in the taped interactions were transcribed. Transcription included verbal and nonverbal interactions. Selected episodes were classified using Mitchell's definition. Each classified definitions were named, and categorized by its purpose. The results were as follows: Nineteen metacommunicative behaviors which used frequently by nurses-approaching, mediating eye level, eye contact, touching, encouraging, turnabout, mimic voice, giving choices, friendly demand, expansion, tagging, repeating and confirming, identification, reflection, baby talk, symbolization, description of acts, relaxed posture, turning away- were identified and organized into four categories. They were call for attention, facilitating response, empathy, and tension release. In conclusion, nurses in this study used metacommunicative behaviors frequently and these behaviors were effective in interacting with children. It is suggested that any educational programs to teach communication skills to nurses need to include techniques on metacommunicative behaviors. This will help nurses to be more sensitive to different characteristics of their patients.

• 한국통신학회논문지
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• 제25권10A호
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• pp.1529-1539
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• 2000

이동 통신 망에서 초기 호 설정 과정에 필요한 액세스 채널의 접속은 시스템의 성능 및 용량과 밀접한 관련이 있다. 이 논문에서는 IS-95 CDMA 표준에 따른 액세스 채널의 동작 및 구조를 설명하고 관련된 시스템 패러미터 를 소개한다. 분석을 통하여, 기지국의 반경, 최대 재전송 횟수, 엑세스 채널과 페이징 채널의 메시지 에러율에 따른 액세스 채널이 가질 수 있는 여러가지 성능 통계량을 산출하였다. 동일한 슬롯에 2개 이상의 전송이 발생하면 충돌로 간주하는 Slotted aloha 모델에 비해, 동일한 슬롯에서도 1 PN chip 이상의 간격이 있다면 성공적인 도착으로 간주하는 IS-95 CDMA의 throuhput 이 훨씬 뛰어남을 알 수 있었고, 주어진 호 차단율에 따른 기지국의 적정 트래픽 채널 수를 유도할 수 있는 기준을 제시할 수 있었다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제16권4호
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• pp.1209-1223
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• 2022

Blood pressure is one of the key physiological parameters for determining human health, and can prove whether human cardiovascular function is healthy or not. In general, what we call blood pressure refers to arterial blood pressure. Blood pressure fluctuates greatly and, due to the influence of various factors, even varies with each heartbeat. Therefore, achievement of continuous blood pressure measurement is particularly important for more accurate diagnosis. It is difficult to achieve long-term continuous blood pressure monitoring with traditional measurement methods due to the continuous wear of measuring instruments. On the other hand, radar technology is not easily affected by environmental factors and is capable of strong penetration. In this study, by using machine learning, tried to develop a linear blood pressure prediction model using data from a public database. The radar sensor evaluates the measured object, obtains the pulse waveform data, calculates the pulse transmission time, and obtains the blood pressure data through linear model regression analysis. Confirm its availability to facilitate follow-up research, such as integrating other sensors, collecting temperature, heartbeat, respiratory pulse and other data, and seeking medical treatment in time in case of abnormalities.